JUKI MEB-3200 Instruction Manual page 68

Fig. 1
Fig. 2
D
Fig. 3
0
Fig. 4
54
1 mm
Approx. 1 mm
1 to 2 mm
■ T type (short thread trimming without gimp)
Adjusting the looper thread presser
1) Loosen setscrew .
2) Fully press downward throat plate
1)
3) Lightly press upward the looper thread presser so that a
clearance is not provided between looper thread presser
and the bottom surface of throat plate
setscrew .
4) Loosen nut and tighten adjusting screw
the top end of the screw comes in contact with looper
bracket .
5) Further, turn it by 1/4 turn and fix it with nut
6) Loosen nut . (Fig. 2)
7) Press section of installing base
arrow mark D with finger, tighten adjusting screw
that the thread guide section of looper thread presser
protrudes from throat plate
mm and fix the screw with nut
• When the clearance provided between throat
plate and the looper thread presser is
smaller than the specified value, the looper
thread holding force is insufficient. As a
result, stitch skipping at the start of sewing
or defective roll-in of thread will be caused.
• W h e n t h e l o o p e r t h r e a d p r e s s e r i s
excessively pressed to throat plate
component breakage or excessive tightness
of stitches at the start of sewing will result.
Adjusting the looper thread trimming knife
8) Loosen setscrew and adjust so that the top end
of looper thread trimming knife
position of 1 to 2 mm from section
and that a clearance of 0.2 to 0.4 mm is provided
between the bottom surface of the looper thread
trimming knife and throat plate
9) Loosen nut .
10) Tighten adjusting screw
of looper thread trimming knife
end plane of throat plate
mm. Then fix it with nut
11) Press section of knife installing base
the direction of arrow mark D with finger, tighten
adjusting screw
the top end of looper thread trimming knife
aligns with the end plane of throat plate
the base. The standard of the protruding amount of
adjusting screw is 1.4 mm. (Fig. 2 and Fig. 3)
• When the lateral position of looper thread
trimming knife
trimming failure or interference with the
presser will result.
• When looper thread trimming knife
positioned too high, looper thread trimming
failure or cut-off of stitches will result.
When the looper thread is not retained immediately
after threading or the like, perform sewing after
retaining the looper thread at section
plate with looper thread presser
and install it. (Fig.
. Then tighten
in the direction of
by approximately 0.5
. (Fig. 2 and Fig. 3)
is located at the
of throat plate
. (Fig. 3 and Fig. 4)
so that the blade point
protrudes from
by approximately 1
. (Fig. 1 and Fig. 3)
(double thread screw) so that
. Then fix
is not obtained, thread
of throat
.
until
.
so
,
in
is